The operation of deep extended reach wells in Bohai Oilfield is affected by the deep formation pressure on the wellbore, which can easily cause instability problems. To address this issue, this article takes a profile of a certain oilfield in Jinzhou as an example to con-duct research on the method of constructing a geodetic model using seismic data, as well as the interpretation method of rock mechanics logging in Jinzhou oilfield. The main understandings obtained include: (1) the formation with stress concentration in the under-ground stress field is more prone to complex underground situations; (2) The finite element model constructed by combining seis-mic and logging data can to a certain extent reflect the real situation of the underground stress field, helping on-site operation decision-making; (3) Optimizing the wellbore trajectory based on the earth's stress field can effectively avoid complex underground situations and reduce operating costs. Based on the understanding of deep Geological mechanics, a series of engineering techniques can be used to further reduce the possibility of complex underground situations, thereby achieving the goal of cost reduction and efficiency improvement.